I've been having the same issue with my 2020 RAV4 Hybrid. The Toyota app stopped updating the odometer around December 20th, 2019, and the app states that it can has update information however when forcing an update of the door lock status it freezes and eventually times out. The remote start button in the app tries to work but nothing happens. More recently, I've noticed that the key fob remote start does not work. The car will cycle through the locks and the lights but the vehicle does not start.
To try and fix this (I'm in Canada), I tried reaching out via the SOS button with the folks their attempting a reauthorization of connected services, alas this did not fix the issue. Oddly enough, at the end of the SOS call the car would not disconnect and kept recalling connected services. To get the car to stop redialing SOS I had to hold the SOS button for 2 seconds at which point it ended the repeated calls.
Next steps are a trip to the dealership this weekend to see if they can diagnose what is going on. From their end, the software indicates that the car is fine and can be communicated to.